Differential mechanism



May 6, 1930.

F. E. WYMAN DIFFERENTIAL MECHANISM Filed Feb. 10. 1930 Patented May 6; 1930 UNITED S ATES E. w m, oFFAuNo n, ivrrnnnsorra;

Application filed February l0, 1 Nd;

I V This invention pertains to diiferential mechanisms and relates particularly to means for optionally looking or unlocking such a mechanism. i j i In the embodlmentq here 1llustrated,the transmission (lGVlCG for automobiles shown 1n my Patent No. 1,742,744: of J any? 1930, is:

illustrated as being applicable to "such looking means. However'itis apparent that any such device wherein two freely rotative ele-f ments are mounted upon a shaft carrying a power transmission device intermediate of,

same and common to both is equally mechanism;

The principal object of the invention-is to provide a simple, selective, manuallyoperative look. I a

The accompanying drawing forming part of this application and in which like refer? ence characters indicate like parts is a transverse sectional view through a shaft upon:

which is mounted a differential mechanism such as shown in my former patent above referred to.

1 represents the driving shaft uponwhich is keyed the hub-like member 2 carrying a plurality of radially disposed arms or g 7 ud eons 3 upon which are mounted the in- .v

3o termediate beveled gears 4, there" however being but one of such gudgeons andgears, shown in this illustration as the installation of the locking mechanism may occur intermediate of two such gudgeons and there may be an even or odd number of the latter as preferred.

The gear or pinion 4c is illustrated as being:

'nism will compensate for such unequal stress,

susceptible to the installation of such ti-lea erspring ly mounted one above the other on the ver-i 1a t e event of the 'devic'eihein iidiii" connectionwith the driving wheels at an ammonia thedesirabilityof Being able" to loc lnthe differential thus causing be" g applied to hoththe' discs" 15 easement:-

, V The, lockingmechanism here illustrated CUmpfigt s (if 1- hollow .aiiittlly iron the up rmesreiia ea-pant somedistance Below specs i36 the b v y l i 1 9. 1 ndfipl y, ofth'e h'fi lfi'and through fie-side of the shaft is formed the hole or openin'g fl W ichrgis" messiah tra sparently a 6% rad i l u "'sgosed hole or teaser-eater gh t "Mee ings;ismsauaana at lathe lever; 11; the innermost end of when is somewhat en: Iar ed as at 'iag-andoccuraWi 7*o f tne snaraqn 1- is inst" Whic T biases lever .towardsitsuppefi diets or lave I o v mountin leis aegis a o'se bnqan it 1 ethe lower face: as the hasrorengagementwahin y ganeaor a senes of concentrieal'l anged hol I Lucian dog: vis pivotally mounteu aerate-late theaterfiost end or the, lease-'11 and-is slidablyopsrable a diagonally disposed 'annelin ripper 1: I eaien'ctibl beyond Y 16 111 the me gear 6 the l upset tacethaeet for engagement with anyone of a like series of holes 19' in the lower face of the disc gear 75. V

As a'means for optionally'operatin'g the lever 11 I have shown thepintle or pitman 20 installed within a hole? of the shaft and impinging the enla edend 12 of the lever V above the spring 1 and it'is apparent that this pitman maybe operated in any desired manner manually and provided wlth means I for its being retained in its'depressed or extended position,but in the event of not being thus provided it 1 is'designed to be held in locked position by hand, or by the stress upon the dogs if the latter is continued, otherwise the actionof the spring 13 will tend to re- V store the lever to its normal horizontal position, thus withdrawing the dogs and 16 from active locked engagement with the discs5and6; o 1

From theabove it is apparent that whenit 1, becomes desirable torotatethe discs 5 and 6 -i f i 6 in fixed relation, all that is necessary is to depress the pitman 20, thus locking the hubs of the discs to thefdrivingihubfl,and when p the pitm'an is released the normaltaction j of the spring 12 will release thefmechanism v 15 so that normal action of the diiferenti'al will I occur .it further beingobviousthat the dej vice isapplicable to various forms-of difiere cntial mechanisms apartfr om that here spe-- cificallyreferred to, r b v V, c 20 c 'Having thus described my invention, what I claim and desire to securejby Letters Patent, is: v j v 115: 7,; l;.- The combination with dilferential ggear o mechanism including a driving shaft, a hub p V '25 thereupon, having radially disposed gears in- 1 L n termediate ofand driving separate disc gears, of means carried within the huband selec tively operable axially of the shaft for 'locki i ing said differential. V p 7 2. 7 he combination" with ashaft: having a differential intermediate of opposed driven elements, of manually controlled means operable axially of the shaft for locking 0r un locking the differential. i 7 .e

3, ,A differentialcontrol mechanismrcomprising in combinationtwo driven elements,

a driving hub intermediate of said elements, .means carried by said hub for selective engagement with said elements. V t

4. A differential control mechanism comprising in combination. a shaft,two driven 7 elements .upon said shaft, driving means intermediate of said driven ,1 elements,-locking c, means carried by-csaidintermediate means,

and means operable longitudinally the shaft for control of the'locking means; 1

r 5. In combination a shaft, adifi'erential on said shaft, optional locking meanscooperatively. associated with saiddiiferential' and means for-operating the locking means dis; V

posed axially of theshaft. v

Intestimony whereof I affix my signature.

or FBANKE. WYMAN; V 

